Spark-arrester.



I. G. TORR.

SPARK ARRESTER.` APPLICATION FILD MAY I2, 1916. 1,199,720. Patented sept. 26,1916.

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JOHN GEORGE TORR, OF SYDNEY, NEW SOUTH WALES, AUSTRALIA.

SPARKLARRESTER.

Application filed May 12, 1916.

To all whom it may cof/cern Be it known that I, JOHN GEORGE ToRR, a subject of the King of Great Britain, residing at Sydney, in the State of New South Wales, Commonwealth of Australia, have invented certain new and useful Improvements in Spark-Arresters, of which the following is a specification.

This invention relates to improvements in spark arresters, for locomotives or stationary engines or furnaces, of the type consisting of a cylindrical or other shaped screen or grid xedly supported on or over the mouth of the smoke stack. It has been found that spark arresters of this type frequently become clogged owing to the soot particles adhering to the wires or rods forming the screen consequently reducing the draft.

The object of the present invention is t0 remove the adhering soot particles when necessary by operating a lever or handle from the cab of the engine or other convenient position.

According to the invention I provide a wire or light metal frame preferably eX- ternal and concentric with the arrester screen. This frame consists of a number of wires, rods or bars pivoted above the spark arrester and secured to a movable member below it. On the frame are fastened a series of Scrapers preferably annular or U-shaped each of which takes against a wire or rod of the screen so that on the 'frame being moved or reciprocated over a segment of the screen the Scrapers remove the soot adhering to the wires thereof. The frame is reciprocated by a rack and pinion or other actuating mechanism operated by a lever or handle.

In the accompanying drawings is illustrated a spark arrester fitted with my improvements, Figure 1 being a sectional elevation. Fig. 2 a plan, and, Fig. 3 an enlarged detail in perspective.

5 represents the wires or rods of a spark arrester screen supported on a fixed frame 6. Pivoted on a central pin 7 is an outer frame consisting of bars 8 corresponding in Specification of Letters Patent.

Patented Sept. 26, 1916.

serial No. 97,170.

number to the rods forming the segments of the frame 6. The bars 8 end in the movable plate 9 and have secured thereon the U- shaped Scrapers 10 one for each of the wires 5 in each segment. The pinion 12 on the movable frame'is in gear with the segmental rack 13 on the fixed screen frame. On said pinion being rotated the movable frame is carried around and as the openings of the Scrapers 10 are slightly greater than the diameter of the wires 5, reciprocation or movement of the outer frame through a segment of the arrester removes any soot adhering to the wires thereof. A

Having thus described my invention what I claim as new and desire to protect by Letters Patent is 1. A spark arrester comprising a screen formed of a plurality of wires, a rotatable frame, and a series of soot-Scrapers carried by the frame, each embracing a wire of the screen.

2. A spark arrester comprising a screen formed of a plurality of wires, a rotatable frame, a series of soot-Scrapers carried by the frame, each of said sera-pers embracing a wire of the screen, and means for operating said frame.

3. A spark arrester comprising a screen formed of a plurality of wires, a'frame arranged externally of the screen, a series of U-shaped Scrapers secured to said frame and each extending around a wire of the screen, and a rack and pinion for imparting a relative movement to said frame and said screen.

4. The combination of a plurality of strands of wire arranged to form a spark arresting screen, a frame mounted for rotation relative to said screen, a plurality of scraping elements on said frame, one of said elements for each strand of wire and embracing said strand, and means for moving said screen and frame relative to each other. 0

5. The combination of a plurality of strands of wire arranged to form a spark arresting cage, a frame rotatably mounted on the cage and. disposed externally thereof,

a scraping element for each strand of Wire from said frame and extending around said secured to said frame, and means for rostrand, and means for rotating said frame. l0 tating said frame. In testimony whereof I have hereunto set 6. The combination of a plurality of my hand. v strands of Wire arranged to form a spark JOHN GEORGE TORR. arresting cage, a frame enveloping said cage and rotatably mounted thereon, a scraping member for each strand of Wire projecting YVitnesses CHARLES E. GRAHAM7 HENRY W. CLARKE.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents. Washington, D. C. 

